16-year-old O'Sullivan becomes youngest Symetra Tour winnerMESA, Ariz. (AP) Hannah O'Sullivan became the youngest winner in Symetra Tour history Sunday, shooting a 3-under 69 for a four-stroke victory in theSI Staff|Share on FacebookShare on XAdd us as a preferred sourceAdd us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished Feb 23, 2015 | Modified Feb 23, 2015SI STAFFShare on FacebookShare on X